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4" x 4" Clay-Clay Coupling
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6" x 4" Clay-Clay Coupling
6" x 6" Clay-Clay Coupling
8" x 8" Clay-Clay Coupling
10" x 10" Clay-Clay Coupling
12" x 12" Clay-Clay Coupling
15" x 15" Clay-Clay Coupling
18" x 18" Clay-Clay Coupling
24" x 24" Clay-Clay Coupling